Canon 5DS and 5DSR which one is more worth buying?

The 5DS/5DSR is an extended version of the 5DIII (or a competitor specifically launched for Nikon cameras of the same class) whose operation, housing, processor, etc. are no different from the 5DIII. The difference: 5DS is a high pixel version of 5DIII (seems to have reached the ordinary medium format pixels) 5DSR is based on … Read more

What is lens distortion? How can it be minimized?

What is lens distortion? How can it be minimized?The so-called aberration is the distortion phenomenon of the lens, that is, the error between the image formed by the lens and the appearance of the original scene. The lens is good, the aberration is corrected, and the aberration is small; the lens without aberration does not … Read more

What are the factors that determine lens quality? How to choose a lens?

What are the factors that determine lens quality? How to choose a lens?The lens quality referred to here mainly refers to the imaging quality of the lens. The function of the lens is to clearly image the subject and record it on the imaging carrier. The imaging quality of the lens determines the image quality … Read more

Is a prime lens better or a zoom lens better?

Is a prime lens better or a zoom lens better?The so-called fixed focus lens is a lens with a fixed focal length. Fixed focus lenses include wide-angle fixed focus lenses, standard fixed focus lenses, telephoto fixed focus lenses and special function fixed focus lenses. Performance pros and cons: The number of lens sets of the … Read more